Synthesis and Optical Properties of Mn2+-Doped Amino Lead Halide Molecular Clusters Assisted by Chloride Ion

文献类型： 外文期刊

第一作者： Liu, Li

作者： Liu, Li;Peng, Xitian;Liu, Li;Zhang, Jin Z.;Xu, Ke;Pan, Keliang

作者机构：

期刊名称：JOURNAL OF PHYSICAL CHEMISTRY LETTERS （ 影响因子：6.475； 五年影响因子：7.643 ）

ISSN： 1948-7185

年卷期： 2021 年 12 卷 31 期

页码：

收录情况： SCI

摘要： Mn2+-doped amino lead halide molecular clusters (MCs) are synthesized using amine (e.g., n-octylamine, or butylamine) as passivating ligand and MnX2 (X = Cl or Br) as the Mn2+ doping source at room temperature. Their optical properties are investigated with UV-visible absorption, photoluminescence (PL), and PL excitation spectroscopy. The Mn2+ precursor plays a vital role in the synthesis of Mn2+-doped MCs. MnCl2 seems to facilitate the incorporation of Mn. The MnCl2 doping causes electronic absorption blue shift and leads to a spin-forbidden T-4(1) -> (6)A(1) Mn d-electron emission. With the help of time-resolved PL, Fourier transform infrared, and electron paramagnetic resonance results, a model is proposed to explain the formation mechanism. We suggest that Mn2+ doping replaces Pb2+ is assisted by Cl- ions that replace Br- ions. This study demonstrates the possibility of doping MCs and has important implications in gaining new fundamental insight into the growth mechanisms of perovskite nanostructures.

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